TITLE:
Electrical Behaviour and Spherulites Morphology of HDPE/PP Polyblends with HDPE as Base Material
AUTHORS:
Prakash Chandra Sahoo, Rabiranjan Murmu, Sarat Chandra Patra, Chiranjit Dutta, Harekrushna Sutar
KEYWORDS:
Polymer Blend, Electrical Properties, Crystallization, Morphology
JOURNAL NAME:
Materials Sciences and Applications,
Vol.9 No.10,
September
21,
2018
ABSTRACT: Polymer composites of virgin high density poly
ethylene (HDPE) and virgin polypropylene (PP) are prepared. PP of weight% of
20, 30 and 50 are reinforced to HDPE in the form of pellets. They are converted
into raw polymer sheets using a two roll milling machine. The prepared raw
sheets have undergone compression moulding to fabricate polymer sheets to study
electrical properties like dielectric strength, surface resistivity and volume
resistivity at atmospheric temperature and pressure. Result shows dielectric
strength and volume resistivity decreases with addition of PP to HDPE, whereas surface resistivity increases. Crystal
growth rate is observed using a cross polarised microscope (PLM). The
microscopy results reveal, the PP crystallizes faster than HDPE and the growth
rate declines for the polyblend; showing non-uniform and hazy spherulitic
structure.